Same shape as uhhm/gdo: a v* tag runs makepkg on the x86_64 (ergo,
"bare") and aarch64 (klokka) runners, uploads to the [uhhm] Arch
registry under namespace bl, and creates a release with the changelog
section as notes. The tag must agree with PKGBUILD's pkgver and
Cargo.toml's version. Without a REGISTRY_TOKEN secret the publish step
warns and skips so the build is still verified.
Version jumps to 0.4.0 because upstream already tagged v0.2.1 and
v0.3.0 on this history before the rewrite reset Cargo.toml to 0.2.0.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>